Residents of apartments no longer need to hear the sound of sewage through their neighbors’ waste pipes. Huliot of Kibbutz Sde Nehemia makes acoustic insulated pipes from a unique plastic compound that does not pollute the environment. Six European countries have just purchased them.
http://www.jpost.com/Enviro-Tech/Israeli-firm-brings-green-sewage-pipes-to-European-countries-323046
http://www.youtube.com/watch?v=YdNPINZhenw